You Will Need:1. Pencil, Colored pencils2. Mass, Volume and Density Review

Labs- Due now3. Assignment Log #4 – Update w/new

assignment4. Elements, Compounds and

Mixtures – 1 sheet 2 sides – Bookshelf – This is only Part 1

Test #3 Retakes1. 2 opportunities remain

Update Log #41. Bohr Model & Wave Model +

Electrons and Bonding Returned today

2. Assignment Log #4 – Update w/new assignment

In Charge of Leading Discussion1. Log into Learning Point2. Daily Assignments3. This Week4. Open “Elements, Compounds

and Mixtures” slide share5. Use your abbreviation skills

Elements are pure substances made of only one kind of atom.

As we have learned, atoms are tiny structures found in all matter.

Most substances contain many different atoms.

It is how those atoms are arranged that determine whether you have an element, compound or mixture.

1. One kind of atom2. Pure (because all particles are the

same)

3. Smallest particle to retain identity of the element

4. Separated only in nuclear reactions

Particles look like:

Every atom looks exactly the same

w/ the same number of protons

Oxygen

Hydrogen

11

1

88

8

Example:

Your Example?

Aluminum: Every atom of aluminum

in this can is exactly the same

1. Two or more kinds of atoms chemically bonded

2. Pure (because all particles are the same)

3. Smallest particle to retain the identity of the compound (SET RATIO of particles)

4. Separated or rearranged in chemical reactions CO

2

Particles look like:

Every compound looks exactly the

same w/ the same set ratio

Carbon Dioxide – CO2

Sodium Chloride - NaCl

Example:

Your Example?

Salt: Every molecule of the

compound NaCl is exactly the same

1. Two or more elements and/or compounds blended together physically

2. Not pure (because all the particles are not the same)

3. Separation through distillation, magnetic, evaporation, density, or particle size

4. No set ratio

Particles look like:

Each particle keeps its own identity….they are just “blended” together

Mixture #1

Mixture #2

Examples:

Your Examples?

Heterogeneous: Different components are easy to see in this

type of blending

Homogeneous: Different components are difficult to see because they are

evenly distributed

Compound

Mixture

1. A solution is a mixture where all the components blend together to look like one substance.

2. A solution is a homogeneous mixture that appears to be a single substance.

3. The solution is composed of particles of two or more substances that are distributed evenly among each other and have the same appearance and properties throughout.

1. In solutions, the SOLUTE is the substance that is being dissolved and usually is the smaller quantity in the mixture.

2. The SOLVENT is the substance in which the solute is dissolved and usually is the larger quantity in the mixture.

3. It is the SOLVENT that is doing the dissolving.

4. Go to page 144-145 in your textbook: Give examples of solutions in various states.

• Homogeneous: 2 or more things evenly blended and disappear into each other.

• Solute – Smaller quantity by %• Solvent – Larger quantity by %• Solution – a homogeneous

mixture

• Heterogeneous: 2 or more things put together and still can be seen.

• No set RATIO.

Have you ever put sugar into lemonade and seen the grains of sugar sink to the bottom and not dissolve?

This is because the lemonade (solution) is supersaturated. In other words, there is not enough water (solvent) to completely dissolve the sugar (solute).

Temperature and Pressure can affect saturation levels.

Saturation Level What does this mean?

What does this look like? (color)

Unsaturated

Saturated

Supersaturated

•Mixture contains more solvent than solute

•Able to dissolve more solute

•Mixture contains the % of solute completely dissolved by solvent

•No able to dissolve more solute

•Mixture contains the % of solute unable to be dissolved by the % of solvent at the given temp.

High temp usually = higher solubility

1. We now know the definition of Element, Compounds & Mixtures

2. What do their particles look like?

1. Elements, Compounds & Mixtures - To be “on-time” Pgs. 1 & 2